Development and application of LSP micro shock driver

当激光照射在固体表面（金属表面）时，固体被激光的光能激发，在表面产生等离子体，等离子体在环境气体中形成激波。本研究进行了一项有效利用这种冲击波的研究。我们进行了一个实验，测量由激光的光收集产生的冲击波。它是通过激光照射各种金属板而产生的冲击波。我用铝、不锈钢、黄铜、钛做金属板。我们进行了实验，确定了2006年冲击波爆发的极限，并对2007年激光进行了较大能量强度的辐照。在此强度下，我利用阴影图形学和BOS方法在* 1mm左右的1mm观测域中光学地观察到冲击波或状态的发生，并要求冲击波马赫数随时间的变化。对激波的测量要求每隔20ns测量一次激波的位置。这种情况下的测量范围以10 μm为单位，测量邻居，困难，但通过多次实验完成获得了可靠的数据。当它通过提供的激波的位置数据追求时间函数的度时，它位于球面波和平面波的传播特性之间，并且在球面波的传播特性中变得非常接近。冲击波爆发后的马赫数是相当高的，马赫数约为15。激波的马赫数与物质的金属性质无关，结果与原来的预测相反。

When we irradiated a laser on the solid surface (a surface of metal), a solid is excited by light energy of a laser and plasma will be induced at the surface, so as a result, a shock wave is formed in an ambient gas by plasma. The present study performed a study to utilize this shock wave effectively. We performed an experiment measurement of a shock wave to occur by collection of light of a laser. The shock wave generated it by irradiating a laser to various kinds of metal plates. I used aluminum, stainless steel, brass, titanium for a metal plate. We performed an experiment the limit around that shock wave outbreak was confirmed for 2006 having enforced the irradiation strength with comparatively big energy strength in 2007 laser. With this strength, I observed a shock wave or a state to occur by shadow graphology and BOS method optically in an observation domain of 1mm around * 1mm and demanded a time change of a Mach number of a shock wave. The measurement of a shock wave demanded a position of a shock wave every 20 ns. Measurement range several of this case were full of the measurement neighbor by a unit of ten μm, difficulty, but reliable data were acquired by many experiment accomplishment. I was located between spread characteristics of a spherical surface wave and plane wave when it pursued the degree for a function of time by position data of a provided shock wave, and it became clear to be considerably near in a spread characteristic of a spherical surface wave. A Mach number just after shock wave outbreak was considerable high speed, and it was shown that a thing of around 15 was provided in a Mach number. A Mach number of a shock wave did not show dependence for metal properties of matter, and the result that was against an original prediction was provided.